Possible disruption of maritime travel is expected over these areas, Pagasa said.

Moderate to heavy rains, which may trigger flooding and landslides, are expected to affect Bicol Region, Eastern Visayas and Dinagat Islands on Thursday.

Meanwhile, the same severe weather will also prevail over the Visayas, Bicol Region, Mindoro Provinces, Marinduque, Romblon, and Quezon on Friday.

Pagasa said Usman could intensify into a tropical storm ahead of its expected landfall over Eastern Samar on Friday.

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The weather bureau advised fisherfolks and those with small seacraft not to venture out over the seaboards of areas under Signal No. 1 as well northern and western seaboards of Northern Luzon and the eastern seaboard of Surigao Provinces due to Usman and the surge of the northeast monsoon.

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